http://en.wikipedia.org/wiki/Resistivity
http://en.wikipedia.org/wiki/Electrical_resistivities_of_the_elements_(data_page)

This table shows the resistivity and temperature coefficient of various materials at 20 °C (68 °F)

Material Resistivity (Ω·m) at 20 °C Temperature coefficient* [K-1] Reference
Silver 1.59×10-8 0.0038 [1][2]
Copper 1.72×10-8 0.0039 [2]
Gold 2.44×10-8 0.0034 [1]
Aluminium 2.82×10-8 0.0039 [1]
Calcium 3.3x10-8
Tungsten 5.60×10-8 0.0045 [1]
Nickel 6.99×10-8 ?
Iron 1.0×10-7 0.005 [1]
Tin 1.09×10-7 0.0045
Platinum 1.06×10-7 0.00392 [1]
Lead 2.2×10-7 0.0039 [1]
Manganin 4.82×10-7 0.000002 [3]
Constantan 4.9×10-7 0.00001 [3]
Mercury 9.8×10-7 0.0009 [3]
Nichrome[4] 1.10×10-6 0.0004 [1]
Carbon[5] 3.5×10-5 -0.0005 [1]
Germanium[5] 4.6×10-1 -0.048 [1][2]
Silicon[5] 6.40×102 -0.075 [1]
Glass 1010 to 1014 ? [1][2]
Hard rubber approx. 1013 ? [1]
Sulfur 1015 ? [1]
Paraffin 1017 ?
Quartz (fused) 7.5×1017 ? [1]
PET 1020 ?
Teflon 1022 to 1024 ?

*The numbers in this column increase or decrease the significand portion of the resistivity. For example, at 30°C (303.15 K), the resistivity of silver is 1.65×10-8. This is calculated as Δρ = α ΔT ρo where ρo is the resistivity at 20°C and α is the temperature coefficient.